Stick edger was running like a top and all of a sudden it quit. I thought I had bumped the kill switch so I pulled it again and it cranked right up. A few minutes later it died again. Now, I can't get it started. Friday, one of my guys brought me a Robin trimmer that he was using and said he could not get it to crank back up. I thought it was flooded so I told him to grab another trimmer to finish up. Later that evening I tried to start it and had no luck. What is going on? I am using the same Shindaiwa synthetic oil, same mix, fresh gas. Fuel filters seem to be fine. What do you think??